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Daikin VRV III-S RXYMQ36 48PVJU Service Manual Page 121

60 hz.
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Troubleshooting by Indication on the Remote Controller
Troubleshooting
Caution
Be sure to turn off the power switch before connecting or disconnecting the connector, or parts may be damaged.
Is power supply
208~230V provided?
YES
The float
switch is connected to
X8A (or X15A) of the indoor
unit PCB.
YES
The float
switch contact is
forming a short circuit.
(continuity check
with X8A (or X15A)
disconnected)
NO
Water builds up in the
drain pan.
YES
The drain
pump is connected
to X25A or terminals Y1
and Y2 of the
indoor unit PCB.
YES
The drain
pump works when
the power supply is reset
for the indoor
unit.
NO
The voltage
of terminals Y1 and Y2
or X25A is 208~230V (within
5 minutes of resetting
the power supply).
YES
112
NO
A short
NO
circuit connector is
connected to X8A
(or X15A).
YES
Becomes
normal when X8A
YES
(or X15A) of the indoor unit
PCB is short
circuited.
YES
NO
The float switch
functions normally.
YES
NO
YES
NO
Provide 208~230V power
supply.
NO
Connect either a short circuit
connector or float switch and
turn on again.
NO
Defect of indoor unit PCB.
Loose connection of connector.
NO
Replace the float switch.
Modify the float switch's
connection and turn on again.
Connect the drain pump and
turn on again.
Check the drain piping for
clogging or upward slope, etc.
Replace the indoor unit PCB.
Replace the drain pump or
check for dirt, etc.
SiUS34-907
Troubleshooting

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    RXYQ18PAY6 service manual & vrv Fulform